Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid Simulations
Abstract Nonlinear theory has predicted that wave‐wave coupling from different band electromagnetic ion cyclotron (EMIC) waves can occur in multiple‐ion plasmas. However, no direct observational evidence has been reported yet. Here we present multiple substructures on the frequency spectrum of EMIC...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL099152 |
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| author | Dan Deng Zhigang Yuan Zuxiang Xue Shiyong Huang Zheng Huang Xiongdong Yu |
| author_facet | Dan Deng Zhigang Yuan Zuxiang Xue Shiyong Huang Zheng Huang Xiongdong Yu |
| author_sort | Dan Deng |
| collection | DOAJ |
| description | Abstract Nonlinear theory has predicted that wave‐wave coupling from different band electromagnetic ion cyclotron (EMIC) waves can occur in multiple‐ion plasmas. However, no direct observational evidence has been reported yet. Here we present multiple substructures on the frequency spectrum of EMIC waves with observations of Van Allen Probes. Some substructures are demonstrated to be excited by nonlinear interactions between preexisting H+ band and He+ band EMIC waves through the bicoherence analysis. Additionally, hybrid simulation displays that a new wave is motivated at sum frequencies after two independent pump waves of different band EMIC waves are injected, implying that the nonlinear wave‐wave interactions could drive EMIC waves with higher wavenumbers. Therefore, this letter provides the first observational evidence of wave‐wave coupling between H+ band and He+ band EMIC waves. |
| format | Article |
| id | doaj-art-b87ebe3e4c094f8db6d9ba1e32a811a1 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-b87ebe3e4c094f8db6d9ba1e32a811a12025-01-22T14:38:16ZengWileyGeophysical Research Letters0094-82761944-80072022-06-014912n/an/a10.1029/2022GL099152Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid SimulationsDan Deng0Zhigang Yuan1Zuxiang Xue2Shiyong Huang3Zheng Huang4Xiongdong Yu5School of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaAbstract Nonlinear theory has predicted that wave‐wave coupling from different band electromagnetic ion cyclotron (EMIC) waves can occur in multiple‐ion plasmas. However, no direct observational evidence has been reported yet. Here we present multiple substructures on the frequency spectrum of EMIC waves with observations of Van Allen Probes. Some substructures are demonstrated to be excited by nonlinear interactions between preexisting H+ band and He+ band EMIC waves through the bicoherence analysis. Additionally, hybrid simulation displays that a new wave is motivated at sum frequencies after two independent pump waves of different band EMIC waves are injected, implying that the nonlinear wave‐wave interactions could drive EMIC waves with higher wavenumbers. Therefore, this letter provides the first observational evidence of wave‐wave coupling between H+ band and He+ band EMIC waves.https://doi.org/10.1029/2022GL099152EMIC waveshybrid simulationwave‐wave couplingbicoherence index |
| spellingShingle | Dan Deng Zhigang Yuan Zuxiang Xue Shiyong Huang Zheng Huang Xiongdong Yu Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid Simulations Geophysical Research Letters EMIC waves hybrid simulation wave‐wave coupling bicoherence index |
| title | Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid Simulations |
| title_full | Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid Simulations |
| title_fullStr | Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid Simulations |
| title_full_unstemmed | Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid Simulations |
| title_short | Nonlinear Interaction Between H+ Band and He+ Band EMIC Waves: Van Allen Probe Observations and Hybrid Simulations |
| title_sort | nonlinear interaction between h band and he band emic waves van allen probe observations and hybrid simulations |
| topic | EMIC waves hybrid simulation wave‐wave coupling bicoherence index |
| url | https://doi.org/10.1029/2022GL099152 |
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